Two types of stroke exist:
Ischemic stroke: About 80% of strokes are ischemic strokes. This type happens when a blood vessel in the brain develops a clot that cuts off blood flow to cells.
Hemorrhagic stroke: The remaining 20% are hemorrhagic strokes, which happen when a weakened blood vessel in the brain bursts. When the vessel bleeds or hemorrhages suddenly, surrounding brain tissue can become damaged. Hemorrhagic stroke is the most serious type of stroke.
Risk Factors
How do you know if you are at risk for having a stroke? There are two types of risk factors: controllable and uncontrollable. Some stroke risk factors, such as high blood pressure and smoking, can be controlled by medication or lifestyle changes. Other risk factors, such as age and race, cannot be changed.
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